I'm a physics graduate student in Italy, and I'd like to continue my formation with a PhD after my thesis.
I would like to consider the idea of going someplace, but the problem I encountered is I wouldn't know where. By this I mean, even in the field of theoretical physics, and even in the subfield of high energy theoretical physics, there are a ton of different research subjects and different teams researching them, even finding "the right one" among my professors was hard enough. How am I supposed to find one among many universities in many countries?
When I asked some friends who are doing a PhD away how they did it, they simply said "Oh I don't know, talking with professors and other students, listening to coffee-break chats, this kind of things". As you may guess, the past year (and possibly the current too) has lacked this kind of things.
How should one approach this problem in Covid times? Is there an online list of who is doing what in what university? Is it common to ask "what are your researchers doing" in an email?